I had gotten a new modem (Netgear CM500) so I had to setup a gateway (my last modem was a combo) Once I was done fiddling with my Nethserver install that I was using for mail and web I had gotten DHCP and some port forwards in. I had a few issues of loosing connection so I didn't think much of it the first few times so I restarted the Nethserver virtual machine. I found out later on that the internet connection was dropping exactly every hour.

The way I have been able to fix it is by restarting Nethserver so I don't think it's a proxmox issue.

Don't know exactly how proxmox handles it, but there may be an interface for bridging from physical host to virtual machines. In other vm environments I know better, this interface could make problems.

DoctorAnoniem:

Also when the connection drops everything drops.

So Nethserver is just not available anymore but proxmox still reachable and internet without Nethserver too? Looks like network config or/in virtualization problem...

DoctorAnoniem:

I can check the logs when I get home from work

Thanks, I think they may help a lot.

And please don't forget:

mrmarkuz:

How do you connect to the modem/internet(static, DHCP, PPPOE)?How are green and red interface configured?

And the network configuration of the proxmox interfaces would also be interesting...

Greetings Adrian (@apradoc). I've installed Nethserver on Proxmox but cannot make it work with Internet to get updates. I've checked ip, gateway and netmask settings but no go. So here am I, asking for your help. Thanks in advance for any help...